Greetings,
I have a Autoconf M4 macro that defines a multi-line preprocessor
symbol.
The symbol is defined correctly when written from the generated
configure
script into confdefs.h. Here's the part of the conrfigure script that
writes the definition to confdefs.h:
configure:
...
echo "$as_me:$LINENO: result: $ac_cv_struct_tm_def" >&5
echo "${ECHO_T}$ac_cv_struct_tm_def" >&6
cat >>confdefs.h <<_ACEOF
#define _RWSTD_STRUCT_TM $ac_cv_struct_tm_def
_ACEOF
cp confdefs.h asd9f8
...
I manually added the copy statement just to capture the contents of
confdefs.h. Here is the macro definition:
confdefs.h:
...
#define _RWSTD_STRUCT_TM { /* sizeof (struct tm) == 56 */ \
int tm_sec; /* seconds after the minute [O..61] */ \
int tm_min; /* minutes after the hour [0..59] */ \
int tm_hour; /* hours since midnight [0..23] */ \
int tm_mday; /* day of the month [1..31] */ \
int tm_mon; /* months since January [0..11] */ \
int tm_year; /* years since 1900 */ \
int tm_wday; /* days since Sunday [0..6] */ \
int tm_yday; /* days since January 1 [0..365] */ \
int tm_isdst; /* Daylight Saving Time */ \
char _C_fill [20]; /* fill to size */ \
}
The problem is that the part of 'configure' that transforms confdefs.h
into the configure headers, config.log, and company does not account
for such macro definitions AFAICT.
config.log:
...
ac_cv_struct_tm_def='{ /* sizeof (struct tm) == 56 */ \
...
config.h:
...
/* The definition of `tm' structure, as defined in <time.h>. */
#define _RWSTD_STRUCT_TM { /* sizeof (struct tm) == 56 */ \
...
How hard would it be to handle such macro definitions? Is it even
possible?
Thanks,
Eric.
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